Fix flake8 warnings.

Signed-off-by: Michael Price <loneviking72@gmail.com>

mayan/apps/navigation/forms.py

@@ -1,7 +1,6 @@
 from __future__ import unicode_literals
 
 from django import forms
-from django.utils.translation import ugettext_lazy as _
 
 
 class MultiItemForm(forms.Form):

mayan/apps/navigation/tests/test_classes.py

@@ -115,7 +115,6 @@ class LinkClassTestCase(GenericViewTestCase):
 
         self.assertEqual(resolved_link.url, url.url)
 
-
     def test_link_with_querystring_preservation(self):
         previous_url = '{}?{}'.format(
             reverse(TEST_VIEW_NAME), TEST_QUERYSTRING_TWO_KEYS